The normal monthly precipitation (in inches) for August is listed for 39 differe

Question

The normal monthly precipitation (in inches) for August is listed for 39 different U.S. cities. Construct an expanded stemplot with about 9 rows. Find the mean of the data summarized in the frequency distribution. A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the mean salary. A student earned grades of C, A, B, and A. Those courses had these corresponding numbers of credit hours: 3, 6, 2, and 6. The grading system assigns quality points to letter grades as follows: A = 4, B = 3, C = 2, D = 1, and F = 0. Compute the grade point average (GPA) and round the result to two decimal places. Find the median for the given sample data. The ages (in years) of the eight passengers on a bus are listed below. Find the median age. Use the given paired data to construct a scatterplot.

Explanation / Answer

Ans:

23)As,student earned C,A,B,A

corresponding credit hrs 3,6,2,6

We know that

A=4,B=3,C=2,D=1,F=0

C,A,B,A corresponds to 2,4,3,4

Grade point average(GPA)=2*3+4*6+3*2+4*6/(3+6+2+6)

=6+24+6+24/(17)

=60/17

=3.53

22)Calculate mide point of each class e.g for first class (5000+1000)/2=7500

Then multiply each midpoint by corresponding frequency and add it.

Mean=1485000/80=18562.5

Class mid point frequency mid point*freq 1 7500 17 127500 2 12500 12 150000 3 17500 12 210000 4 22500 15 337500 5 27500 24 660000 Total 80 1485000

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